You don't. Its simply not possible.
The only way you can is if it remains at a surface temperature that maintains a nice thick layer of ice.
IE. very cold.
I've discovered ammonia worlds with life and ammonia oceans with no atmosphere. The surface temp was just a bit under the freezing point of ammonia ...but that's under pressure. Without the pressure it would have needed to be much colder and likely well outside of the chance of a subsurface liquid ocean capable of supporting life. But at least it's semi-believable by being at least cold enough to be a freezing point that's recognizable.
Anyone exploring enough to be out in the rift should know that you dont look too closely at the specific numbers. The procedural generator isn't imbued with a full description of physics.